1 // Copyright 2010 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are
6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided
11 // with the distribution.
12 // * Neither the name of Google Inc. nor the names of its
13 // contributors may be used to endorse or promote products derived
14 // from this software without specific prior written permission.
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 // Test the ToPrimitive internal function used by ToNumber/ToString.
29 // Does it [[Get]] and [[Call]] the object's toString and valueOf properties
30 // correctly. Specifically, does it call [[Get]] only once per property.
32 var o1 = { toString: function() { return 42; },
33 valueOf: function() { return "37"; } };
36 assertTrue(typeof n1 == "number");
37 assertTrue(typeof s1 == "string");
40 var valueOfValue = 42;
41 var toStringValue = "foo";
42 function traceValueOf () {
46 function traceToString() {
50 var valueOfFunc = traceValueOf;
51 var toStringFunc = traceToString;
53 var ot = { get toString() { trace.push("gts");
54 return toStringFunc; },
55 get valueOf() { trace.push("gvo");
61 assertEquals(["gvo","vo"], trace);
65 assertEquals("foo", st);
66 assertEquals(["gts","ts"], trace);
69 valueOfValue = ["not primitive"];
71 assertEquals(Number("foo"), nt);
72 assertEquals(["gvo", "vo", "gts", "ts"], trace);
76 toStringValue = ["not primitive"];
78 assertEquals(String(42), st);
79 assertEquals(["gts", "ts", "gvo", "vo"], trace);
82 valueOfValue = ["not primitive"];
83 assertThrows("Number(ot)", TypeError);
84 assertEquals(["gvo", "vo", "gts", "ts"], trace);
87 toStringFunc = "not callable";
91 assertEquals(String(42), st);
92 assertEquals(["gts", "gvo", "vo"], trace);
94 valueOfFunc = "not callable";
96 assertThrows("String(ot)", TypeError);
97 assertEquals(["gts", "gvo"], trace);
99 toStringFunc = traceToString;
100 toStringValue = "87";
103 assertEquals(87, nt);
104 assertEquals(["gvo", "gts", "ts"], trace);
106 assertThrows('Number(Symbol())', TypeError);